Transmitter filling machine



Ma 23, 1933. A.'F. BENNETT 1,910,930

TRANSMITTER FILLING MACHINE Filed Dec. 15 [1929 2 Sheets-Sheet 1 nvvmmp A. F. BENNETT A 77'0PNE Y May 23,- 1933. A. F. BENNETT 1,910,980

TRANSMITTER FILLING MACHINE Filed Dec. 15, 1929 2 Sheets-Sheet 2 6 j a J z 7 if;

M/l/E/VTHR A. f. BENNETT Patented May 23, 1933 -S E PATEN /O E f nance r; manner RICHMOND HILIQNEW yon n assrenon 'ro BELL TELE- nnw onx p j .machine by means of which thismethod may invention consists of method of i filling transmitter buttons and a particular i be: satisfactorily carried out. It is the object of the invention to fill transmitter buttons in such a way that they will givemore satisfactory: andguniform performance untder, operating y conditions.

Animproved transmitter button such as toforeit has been customary tocarry out this may: be obtained infaccordance with this in- Mention is particularly desirable for applia fbationss iwherei it y willbe subjected to severe.

mechanical andIelectrical'treatment such as;

for instance; in a telephone handset. Herecient accuracy nor can the commercial yari-:-

small enough to beneglected inthe filling nations: in the size of the button parts be kept .A

a process; Such transmitters, therefore, may} ;g1"vje satisfactory;- performance for a time/ but,

a; afterca ,period tend to become noisy the resistan ce increases and signaling becomes difficultiparticularlygover long loops. The deterioration ofltheilcarbon contacts is due lhp'ri'ncipally; first to the abrasive action to j a which: the granules are subjected when the transmitter is jarred and second to the ab-} WhiGh iS of very high r stant of shock. yy i 1 i It has been foun a that! B m the but-j i 1 ijnormally high voltages applieclg to the contacts due toinductive voltages generated in y the circuit beingimpressed upon thecarbon i esistance fatfthe inton to awgreaterzdegree of fullnessrthaniis Q possible by ordinary methods the mean conntaetfpressures are increased sotha t the re-,

vsistance does: not rise; to such a high value/1' when the transmitter isjarred so thatfthe "transient voltages developed will not be so? 1 larg 7 th s jwey, oyt ej b a ve c io m the carbon mass s reducedby IGStI'ICtIDg ditheffreedom of 1m)venient of the granules and: the normal resistance and the noise are TRANSMITTER iirnrir mjilmoirii rn rnoimLAnoRAronms,"mconromirenporynsw Your, N; Y5, AYCORPORATION 01m.

irauann ougiiia thelifenfthe mamater; a The I filling must lnot be carried too far however, forit the carbon tends to become packed ther e may be a lossinthe'sensitivityzofthe transmitter.

p l gAll of these requirements are lrnet accord ring to the present inyentionlby iflowing the carbon: into the l chamber 0f the] transmitter button for a definite timednringwhich the button is vibrated ancllconditions are main-. tained. for pro l in the gcompleted,buttonfl 7 A feature of the invention is iilling; ma

chine carrying =outthis method in whichithe transmitters are carrled on avcarr age with a vi ding t he necessary air space filling j nozzle inserted in each transmitters Th l were s dapt d [t be gi e mu den reversing vibratory motion to; settle the carbon so that the required degree of fullness may stened and the nozzle and the filling opening the transmitter are so proportioned that a. small and-controllable fall space is leftwhen wthe nozzle iswithdrawn;

r1 fe atureof the invention is a suspension mounting for the carriage ofthe' machine to preventvariations inbfilling due 110 frictionalchanges ,inthe driven members. lhe inventiona-nd particularly thefilling -m achine andthemanner inwhich it is used will be more clearly iunderstoodirom a con sideration of the following detailed description and a the accompanying drawings in which Fig. 1 an elevationg of the transmitter filling machine;L;Fig is a partial are sectional views oiifthe filling mechanism ta en as i d ca d l fhF a .2; n Figs? 5 and 6 are details; of the transmitter button andfilling nozzleql j t Re ferringnow particularly to Figs; 1 and 2 the 1 carriagel is suspended as a pendulum from thesteel framework 2 'byunean's of provide the necessaryfleiribility in the direction of the carriagefi'notion. Similar rods 6, 6 and springs? ,7 are provided in the horizontalplane to prevent the carriage from 1 moving transversely to itspro'per direction plan view of the m achineyFigsQ and 4 eccentrically mounted drive rod 12 imparts 'having a set screw 3 an oscillatory motion to member 13 which The mem v slides freely in bearings 14,15. ber 13 carries at either end extension pieces 16, 17 projecting toward the carriage but having no permanent connection with it.

On the lower side of the carriage there are downwardly extendin brackets 18, 19, each adjusted to leave a gap of about inch between the end of the screw and. the extension piece in each case.

' The motion of the member 13 is imparted to the carriage by this arrangement but due to the gaps, the carriage will be subjected to sudden reversals which, as already pointed out, will settle the carbon and permit a more complete and uniform filling.

When a transmitter button '20 is to be filled, it is placed in a suitable receptacle- 21 beneath the filling nozzle 22 of the carbon supply chamber 23. The catch 24in the position shown in Fig. 4 holds the cover 25 of the chamber securely in place due to the compression of spring 26. When the catch is released the chamber, which is keyed to f flow, and the motor is started by momenta rily closing key 29. As the motor starts the worm gearing turns the metal disc 81 sothe sleeve 27 by'means of pin 38 and'slot' 89 to prevent its rotation, may readily be pushed upward in the sleeve to raise the nozzle while the transmitter is being put in place. When this has been done the catch is again locked so that the nozzle 22 projects into the button 20 a definite distance as determined by pin 38 contacting the bottom" of slot. 39. The valve 28 is then moved to the open position to permit the carbon to that the segment of insulation 32 moves out from .under contact finger'33and a circuit shunting the contacts of the, key is completed .by the disc bridging contact fingers 33 and 34. The motor, therefore, continues to run after key 29 isr'eleased and is stopped only when segment 32 again moves under finger 33. It has been found by experiment that a satisfactory filling may be obtained by continuing. the filling operation for one minute and operating the motor at such. a speed that the carriage moves through about 300 com-' plete oscillations in this time. It will be understood, of course, that these values may be modified to suit the conditionsof any particular case. Obviously, the filling time may be adjusted to any other value by choosing the proper ratio for the worm gearing.

VVhen. the filling operation is complete, the valve 28 is first closed. Catch 245is then released and the nozzle is withdrawn from the transmitter chamber, thereby causing the carbon in the nozzle to flow into the space vacated by the nozzle and leaving a predetermined void 35, as shown in Fig. 6. The chamber is then closed by "cap 36' and is ready to be put in service.

While the invention has been described witlrreferenc-e to a particular machine, .it will be understood that themachine may be modified in various ways withinthe scope of the invention, .llIoreover, the machine is but one featureof the invention for the filling operation could, in fact, be carried out by hand by tapping the button while the carbon is fiowing into it, but it would be difficult and very laborious to obtain a sufficiently uniform filling by any such manual method.

The invention, however, is intended to be,

filled, a source of supply of filling material for the transmitters carriedby the carriage and including members engaging and partially filling the transmitter buttons, flexible spring means for supporting the entire ,weight of the carriage, an oscillating mem her at eitherend of the carriage normally out of contact therewith and means for driving the oscillating members whereby a quick reversing oscillatory'motion is imparted to the carriage.

2. In a' transmitter filling machine, a carriage carrying a transmitter having a. chamber to be filled, a funnel containingfilling material inserted in the chamber, the cross section of the part of the funnel so inserted bearing a definite relation to its bore,'flexing members for supporting the carriage, an oscillating "member at either end of the carriage normally out of contact therewith and means for driving the oscillating mem? bers for imparting to the carriage a quick reversing vibratory motion. .1

I 3. Ina transmitter button filling machine, a carriage carrying a transmitter button to be filled, a supply'chamber containing fill Y ing'material and having a nozzle associated with the button, a reciprocating member having extensions spaced slightly out of contact with either endof the carriage, means for driving said member and means for an tomatically stopping the driving means aftera predetermined time interval.

'- 4. In a transmitter button filling machine, fiat spring members, a carriage supported entirely by said members for holding the transmitter button and adapted for lateral movement by flexing the spring members,

and driving means normally out of contact with the' carriage for imparting to the carriage a quick reversing oscillatory motioin,

5."In a transmitter filling machine the combination of a transmitter carriage, laterally flexible springs carrying the entire Weight of the carriage, driving means for the carriage, including areciprocating member at either end of the carriage normally outof contact therewith and a timing mech- 1 V anismoomprising a driven member and contacts cooperating therewithfor automatically stopping the driving means.

6. In a transmitter button filling machine fiat spring members, a carriage supported entirely by said members for holding the transmitter button and adapted for lateral movement by flexing. thespring members,

and a member oscillating the carriage by impacts alternately applied in either direction to cause sudden reversalsofits direction of motion, a motor driving the impacting memher, a timing disc driven bythe motor and contacts associated with the disc for stopping the motor at the end of a predetermined time.

In witness whereof, I hereunto subscribe my name this 9th day of December,1929.

ARTHUR F. BENNETT, 

